How well did Super Cache handle the digg?

My Super Cache announcement only drew 4686 visitors which is an ultra-light Digg. The Digg page for the post received 808 diggs as of a few minutes ago which is great. Thank you for voting! Judging by the sheer number of comments on that post, there’s a lot of interest out there in the plugin.
What about traffic graphs? The spike at the end of the first graph is my nightly Backuppc service kicking in. The second is from Google Analytics. My server could certainly handle a lot more traffic!

A quick look at my uptime shows the server hardly broke a sweat dealing with the extra traffic except where some idiot spammer bots tried to download my archives a few times. Unfortunately the first time that happened the archives weren’t cached and the load climbed.

Yes, Xcache is installed and I’m really impressed with it and the WordPress plugin. The one thing that worried me about the Digg was the effect people leaving comments would have on the site. The more conversation on that post the more often the static page would have to be regenerated. That’s why it’s important that PHP runs as fast as possible, even with static files being served.

Just to let you know, your blog may be behaving abnormally. I just got a comment notification for something I’m quite sure I never commented on (http://ocaoimh.ie/2006/11/26/how-to-make-cocaine/); I’ve never gotten any other notifications for it, either. No idea is this related, and I don’t see how it could be, but thought you’d like to know something was acting weirdly.

Robert Synnott – Oops, that’s a bug in the Subscribe to comment plugin. If I moderate a number of comments at the same time from different posts it gets confused about who to send notifications to. I just upgraded the plugin so hopefully that will fix that!

Robert – it plays extremely well with Eaccelerator. I used that opcode cache before moving to Xcache and it was fine. Squid will cache the html files extremely well too 🙂

Absolutely wonderful! Also, thanks for the link to the XCache mod for WordPress. I’ve been using XCache for a while now and was actually considering creating a plugin to store data in the Var cache. That link just saved me a couple hours of work figuring out how to do it.

what kind of hosting (dedicated/shared/company/etc) do you have? I’m curious b/c I hit the digg homepage yesterday as well … for like ten minutes before my site shut down and then I quickly moved off of it (which sucks) – this is the second such time that my webhost hasn’t been able to handle an influx of traffic and led to nonresponsiveness (or worse) – I’m getting tired of the fact that nearly anytime I get a good link (digg, collegehumor, sportsillustrated.com, whatever) my site crashes and I lose that big traffic opportunity – the first time I didn’t have wp-cache enabled – yesterday, I did, and from the digg comments it looks like that even when the diggs were only up to 70, the site was gone (http://digg.com/music/The_Top_10_Rap_Songs_White_People_Love_2)

I will be looking at super-cache and other ways to try to improve loading, but I’m thinking the real significant change I’ll need to make is in host (currently w/ DreamHost)

I installed the updated version on one of my blogs. It made me recreate the advanced-cache.php file that the first version’s readme file had me eliminate. It seems to be working.
I’m putting the duration much higher than the default. I’m setting the supercache to 24 hours and the other cache to 3. Hopefully that will reduce Bluehost’s CPU use complaint. Thank you for the plug in.

Unless you’re a tester you shouldn’t be using any version of XCache other than the stable release (currently 1.2.1).

Since this is kind of off topic for this post, if you want to know more about my XCache configs (I run XCache on close to 20 web servers) then email me using the contact form on the “About” page on my web site.

Thanks for this plugin! I went from 76 requests a second (tested with ab2) to 567 requests a second running just your plugin. (Installing APC/Xcode has been on my agenda, but I never got around to it.)

Your site seems to have held up well, but I wonder about your comment regarding the overhead of regenerating the cache every time someone leaves a comment… I wonder if it would make more sense to add a little logic that keeps a cached page from being updated more than, say, once every 60 seconds? (Maybe the interval could be user-configurable.) The risk of someone loading a cached page and missing the latest couple comments is a small price to pay for the site staying up in a storm.

But that’s just for extreme situations. Things are about 800% faster using your plugin. Thanks again!

thanks for all your reply and work – xcache and super cache are working just fine now – i think it really was related on the dev 2.0.0 of xcache – 1.2.2-dev just works great but i think the xcache optimizer will only be a good choice in 2.0.0 because in all 1.2.x trunks it does nothing in my mind, does it?

The Golden Compass
First of a three part fantasy/sci-fi series. Some people hate it because of it's anti God message but it's a great read. I found it hard to put down. There's even a Snopes article about the film adaptation.

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